Exhibit 8.1
Tenaris – List of subsidiaries of Tenaris S.A.
Major operating subsidiaries
We conduct all our operations through subsidiaries. The following table shows the major operating subsidiaries of the Company and its direct and indirect ownership in each subsidiary as of December 31, 2010, 2009 and 2008.
Percentage Ownership | ||||||||||||||||
Company | Country of | Main Activity | 2010 | 2009 | 2008 | |||||||||||
Algoma Tubes Inc. | Canada | Manufacture of seamless steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Confab Industrial S.A.(a) | Brazil | Manufacture of welded steel pipes and capital goods | 41 | % | 40 | % | 40 | % | ||||||||
Dalmine S.p.A | Italy | Manufacture of seamless steel pipes | 99 | % | 99 | % | 99 | % | ||||||||
Hydril Company | U.S.A. | Manufacture and marketing of premium connections | 100 | % | 100 | % | 100 | % | ||||||||
Maverick Tube Corporation | U.S.A. | Manufacture of welded steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
NKKTubes K.K. | Japan | Manufacture of seamless steel pipes | 51 | % | 51 | % | 51 | % | ||||||||
Prudential Steel ULC | Canada | Manufacture of welded steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
S.C. Silcotub S.A. | Romania | Manufacture of seamless steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Siat S.A. | Argentina | Manufacture of welded steel pipes | 82 | % | 82 | % | 82 | % | ||||||||
Siderca S.A.I.C. | Argentina | Manufacture of seamless steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Tavsa, Tubos de Acero de Venezuela S.A.(b) | Venezuela | Manufacture of seamless steel pipes | — | — | 70 | % | ||||||||||
Tenaris Coiled Tubes LLC (and predecessors) | U.S.A. | Manufacture of coiled tubing | 100 | % | 100 | % | 100 | % | ||||||||
Tenaris Financial Services S.A. | Uruguay | Financial services | 100 | % | 100 | % | 100 | % | ||||||||
Tenaris Global Services S.A. | Uruguay | Holding company and marketing of steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Tenaris Investments Ltd. | Ireland | Holding company and financial services | 100 | % | 100 | % | 100 | % | ||||||||
Tubos de Acero de México S.A. | Mexico | Manufacture of seamless steel pipes | 100 | % | 100 | % | 100 | % | ||||||||
Tubos del Caribe Ltda. | Colombia | Manufacture of welded steel pipes | 100 | % | 100 | % | 100 | % |
(a) | Tenaris holds 99% of the voting shares of Confab Industrial S.A. |
(b) | In 2009, the Venezuelan government announced the nationalization of Tavsa. For more information on the Tavsa nationalization process, see note 32 “Processes in Venezuela-Nationalization of Venezuelan Subsidiaries” to our audited consolidated financial statements included in this annual report. |